Cisco CRS-1 - Carrier Routing System Router Troubleshooting Guide

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Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
OL-21483-02
Chapter 3 Troubleshooting Forwarding
Troubleshooting Adjacency Information
Troubleshooting Adjacency Information
To troubleshoot adjacency information on Cisco IOS XR software, perform the following procedure.
SUMMARY STEPS
1. show arp location node-id
2. show arp traffic location node-id
3. show adjacency interface-type interface-instance remote detail location node-id
4. show adjacency interface-type interface-instance remote detail hardware location node-id
5. show adjacency ipv4 nexthop ipv4-address detail location node-id
6. show adjacency interface-type interface-instance detail location node-id
Step 7
show cef ipv4 interface type instance location
node-id
Example:
RP/0/RP0/CPU0:router# show cef ipv4 interface
tengige 1/3/0/7 location 1/3/cpu0
Displays IPv4 CEF-related information for an interface.
Verify the interface handle ‘interface is marked’ is as
expected. The command output also shows how many
references there are to the interface in CEF table and the
IPv4 MTU.
Use this command for the ingress and egress interfaces.
Step 8
show cef ipv4 summary location node-id
Example:
RP/0/RP0/CPU0:router# show cef ipv4 summary
location 0/3/cpu0
Displays a summary of the IPv4 CEF table. Check the VPN
routing and forwarding (VRF) names associated with the
node, the route update drops, and that there are the expected
number of incomplete adjacencies.
Note the number of routes CEF has entries for, the number
of load sharing elements, and the number of references to
this node.
Use this command for the ingress and egress line cards and
route processor (RP).
Step 9
show cef ipv4 trace location node-id
Example:
RP/0/RP0/CPU0:router# show cef ipv4 trace
location 0/3/cpu0
Displays IPv4 CEF trace table information.
Check if there is any flap on the prefix.
Use this command for the RP, and ingress and egress
interfaces for the local line card.
Step 10
show cef platform trace ipv4 all location
node-id
Example:
RP/0/RP0/CPU0:router# show cef platform trace
ipv4 all location 0/3/cpu0
Displays CEF IPv4 hardware status and configuration trace
table information.
Verify that the TLU pointer and RPF pointer are as
expected.
Use this command for the ingress and egress interfaces for
the local line card.
Step 11
Contact Cisco Technical Support. If the problem is not resolved, contact Cisco Technical
Support. For Cisco Technical Support contact information,
see the “Obtaining Documentation and Submitting a
Service Request” section on page viii in the Preface.
Command or Action Purpose

Cisco CRS-1 - Carrier Routing System Router Specifications

General

Brand	Cisco
Model	CRS-1 - Carrier Routing System Router
Category	Network Router
Language	English